John ross



at eine sind @wie Letters Patent N 100,193, dated February 22, 187 O.

IMPROVED BQAT-DETACHING- APPARATUS.

The Schedule referred to in these Letters Patent and making part of the same.

To all '1L-'hom 'it may concern v Fe it known that l, JGnN Ross, of the city and county of San Francisco, State of California, have invented au Improved Boat-Detachiug Apparatus; and l do hereby. declare 'the following description hud accompanying drawings v are suiieient to enable any person skilled in the art or'scieneeto which it most nearly apperta'ins, to make and use my said iu-` vention or improvements 'without further invention or experiment.

.Mylinvention relates-.to .thatolass ofapparatususL- fl i for instautuieously detaohing boats when it is necessary to free theol from thetackle after lowering; and

1t consists of two strong bent pins, one at either end of the boat, each having at enc end a. loop or head, hy which to attach a chain, while the other end extends through an eye at the hot-tom of the block, and through another att-ached to the boat.

The chains ti'oin the heads pass down to the bottom ot' the'hoat, and along to the center, where they pass around a sort of capstan or upright shalt, having a crank at the top, and above thethwzn't, by which to turn it.

When the boat is secured, a pinpasses through the thwart, so that the crank hears against it, and is prevented from turning.

To detach the boat, this pin is drawn, and the axle. turns around, unwinding the chain,'and allowing the cuds ol' the pins to he lreed from the eyes inl the ends ot' the boat, alter which they will both be drawn through the eyes in the block, and the boat will tall into the water.

ltclilrring to the accompanying drawings fora more complete explanation ol' my apparatills- Figure 1 is Aa longitudinal vertical section of the boat nttzu-lu-d to the hlocks Figure 2 is a similar view, the hoat being detached.

A is a' part. ot the side ol' a vessel, orpoint where the davits l li are plzieed.

The hout C is hung trom the davits bythe ordinary ltackle 1).

'lhe connection between the tackle andthe boat consists-.ot a stout pin, E, at each end somewhat curved, and having anfeye or head, a, to which the chain F is fastened. y i

The end b of' the pin is extended to such a length as to pass through an eye or sta-ple, c, at the bottom ot'lthe block, and thence through auo.her st iple, (l, which is fastened to the hoat. 4

The chain F thus -holds one end ot' the pin E, while the other end is ldetained h v the staple-d, so that it forms a connecting-link as long as the boat is kept close enough to the hloeks to prevent the end b l'roln leariiiglhestiulled. Y 4 The "chain l passes through (Z, and thence down along the hottoln ot' the hoat to a paint near the center, where it is passed around an upright spindle' or axle J, having a journal at the bottom and another in the thwart or other support, through which it passes. I t is turned by a crank, l, at the top, and,

bywiuding up the chain, and passing a pin, H, through the support Gr in front ot` the crank I, the boat is secured.'

In order to detach the boat after lowering, the pin H is witl'nlrawn, and the chain allowed to unwind till the ends b of the pins E pass out of the staple (l, when they will instantly-turn, as shown in lig. 2, and pass through the eyes c of the blocks, allowing the boat to fall on an even keel. Y

This apparatus is very simple, is easily attached to any boat, and is .very efficient.

Having thus described luy invention,

What L clainl, and desire to secure by Letters Put-A ent, is-

In combination with the device consisting 0f the heut pin E, eye el, and. chain F, the spindle J, crank l, and piu H, for drawing, holding, and releasing to gether the chains F from the two en ds ot' the heat, substantially as'and-for the purpose set forth.

1n witness whereotl I have hereunto set my hand andscal.

' JOHN ROSS. [n s] Witnesses:

M. 1. MCLAUGHLIN, J. L. BOONE. 

